Pith Number

pith:SGPLQYVD

pith:2009:SGPLQYVD6JEGFESWJNIAPTCZAZ

not attested not anchored not stored refs pending

The Role of Column Density in the Formation of Stars and Black Holes

Richard B. Larson

arxiv:0909.3110 v3 · 2009-09-16 · astro-ph.GA · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SGPLQYVD6JEGFESWJNIAPTCZAZ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:04:59.768645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

919eb862a3f2486292564b5007cc59067ecb027ed39de882b4fce9492a3ab009

Aliases

arxiv: 0909.3110 · arxiv_version: 0909.3110v3 · doi: 10.48550/arxiv.0909.3110 · pith_short_12: SGPLQYVD6JEG · pith_short_16: SGPLQYVD6JEGFESW · pith_short_8: SGPLQYVD

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/SGPLQYVD6JEGFESWJNIAPTCZAZ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 919eb862a3f2486292564b5007cc59067ecb027ed39de882b4fce9492a3ab009

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48eae60e063b58fdc76754d1a96981de1bc9252938269433e0e47b5db6df7609",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-09-16T21:18:35Z",
    "title_canon_sha256": "eaf521f0d1b4206247b902bb31c78d08fb2234ec43891de118857b6f378e294d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3110",
    "kind": "arxiv",
    "version": 3
  }
}